m3tk/src/sem/M3CWordProcs.m3


*************************************************************************
                      Copyright (C) Olivetti 1989                        
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*************************************************************************

 Copyright (C) 1993, Digital Equipment Corporation           
 All rights reserved.                                        
 See the file COPYRIGHT for a full description.              

MODULE M3CWordProcs;

IMPORT Text, TextRefTbl;

IMPORT M3AST_AS;

IMPORT M3AST_AS_F, M3AST_TM_F;

IMPORT M3CId, M3Assert, M3CExpsMisc;

PROCEDURE Enter(table: TextRefTbl.T; t: Text.T; w: T) RAISES {}=
  VAR
    new := NEW(REF T);
  BEGIN
    new^ := w;
    M3Assert.Check(NOT table.put(t, new));
  END Enter;

PROCEDURE Initialize(): TextRefTbl.T RAISES {}=
  VAR
    result := NEW(TextRefTbl.Default).init(64);
  BEGIN
    Enter(result, "Plus", T.Plus);
    Enter(result, "Times", T.Times);
    Enter(result, "Minus", T.Minus);
    Enter(result, "Divide", T.Divide);
    Enter(result, "Mod", T.Mod);
    Enter(result, "LT", T.LT);
    Enter(result, "LE", T.LE);
    Enter(result, "GT", T.GT);
    Enter(result, "GE", T.GE);
    Enter(result, "And", T.And);
    Enter(result, "Or", T.Or);
    Enter(result, "Xor", T.Xor);
    Enter(result, "Not", T.Not);
    Enter(result, "Shift", T.Shift);
    Enter(result, "LeftShift", T.Shift);
    Enter(result, "RightShift", T.RightShift);
    Enter(result, "Rotate", T.Rotate);
    Enter(result, "LeftRotate", T.Rotate);
    Enter(result, "RightRotate", T.RightRotate);
    Enter(result, "Extract", T.Extract);
    Enter(result, "Insert", T.Insert);
    RETURN result;
  END Initialize;

VAR
  table_g := Initialize();
  word_g: M3CId.T := NIL;

PROCEDURE IsWordCall(call: M3AST_AS.Call; VAR t: T): BOOLEAN RAISES {}=
  VAR
    defId: M3AST_AS.DEF_ID;
  BEGIN
    IF M3CExpsMisc.IsId(call.as_callexp, defId) AND
        ISTYPE(defId, M3AST_AS.Proc_id) THEN
      VAR
        hId: REFANY;
      BEGIN
        IF word_g = NIL THEN word_g := M3CId.Enter("Word") END;
        IF defId.tmp_unit_id.lx_symrep = word_g THEN
          IF table_g.get(M3CId.ToText(defId.lx_symrep), hId) THEN
            t := NARROW(hId, REF T)^;
            RETURN TRUE;
          ELSE
            RETURN FALSE;
          END; (* if *)
        ELSE
          RETURN FALSE;
        END; (* if *)
      END;
    ELSE
      RETURN FALSE;
    END; (* if *)
  END IsWordCall;

PROCEDURE ArgCount(t: T): CARDINAL RAISES {}=
  BEGIN
    CASE t OF
    | T.Plus => RETURN 2;
    | T.Times => RETURN 2;
    | T.Minus => RETURN 2;
    | T.Divide => RETURN 2;
    | T.Mod => RETURN 2;
    | T.LT => RETURN 2;
    | T.LE => RETURN 2;
    | T.GT => RETURN 2;
    | T.GE => RETURN 2;
    | T.And => RETURN 2;
    | T.Or => RETURN 2;
    | T.Xor => RETURN 2;
    | T.Not => RETURN 1;
    | T.Shift => RETURN 2;
    | T.RightShift => RETURN 2;
    | T.Rotate => RETURN 2;
    | T.RightRotate => RETURN 2;
    | T.Extract => RETURN 3;
    | T.Insert => RETURN 4;
    END;
  END ArgCount;

BEGIN
END M3CWordProcs.